Question

Calculate the pressure exerted by a girl on the ground if her mass is 50 kg and the
area on her shoes in contact with the ground is (a) 150 cm2
(high heels);
(b) 400 cm2
(flat shoes). (Take gravitational field strength; g = 10 ms-2
)

Answer 1

Answer:

Assume P lies outside circle O and \overline{\rm PA}

PA

and \overline{\rm PB}

PB

are two line segments that are tangent to points A and B on circle O. Compare the following:

A. length of \overline{\rm PA}

PA

B. length of \overline{\rm PB}

PB